Android: displaying one dialog after another

So having got my progress bar dialog to appear I now find myself prevented from displaying a second dialog to announce the results of the long running action.

Here is the code:

   final ProgressDialog myOtherProgressDialog = new ProgressDialog(
     this);
   myOtherProgressDialog.setTitle("Please Wait ...");
   myOtherProgressDialog.setMessage("Adding item to study list ...");
   myOtherProgressDialog.setIndeterminate(true);
   myOtherProgressDialog.setCancelable(true);

   // TODO spinner not showing for some reason ...
   final AlertDialog dialog = new AlertDialog.Builder(this).create();

   final Thread add = new Thread() {
    public void run() {
     AddItemResult add_item_result = addItemToList(
       Main.default_study_list_id,
       (String) item.item_node.atts.get("id"));
     
     dialog.setTitle(add_item_result.getTitle());
     dialog.setMessage(add_item_result.getMessage());
     dialog.setButton("OK",
       new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog,
          int which) {
        
         return;
        }
       });
     
     myOtherProgressDialog.dismiss();
     //Looper.prepare();
     dialog.show();
    }
   };
   myOtherProgressDialog.setButton("Cancel",
     new DialogInterface.OnClickListener() {
      public void onClick(DialogInterface dialog, int which) {
       add.interrupt();
      }
     });
   OnCancelListener ocl = new OnCancelListener() {
    public void onCancel(DialogInterface arg0) {
     add.interrupt();
    }
   };
   myOtherProgressDialog.setOnCancelListener(ocl);
   closeMenu();
   myOtherProgressDialog.show();
   add.start();

The problem is that if I just try to show the second dialog I get this error:

java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()

and if I try and edit the existing progress dialog to show the results of the long running action I am told:

android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.

Which is a bit frustrating. Is my only option to display results in a completely new activity?